Padlock



Patented June 16, 1925. j

UNITED STATES SAMUEL B. FRAIM, 0F LANCASTER, PENNSYLVANIA.

PATENT OFFICE- p PADLOCK.

Application filed May 28, 1924. Serial No; 716,401.

To all whom t may concern:

Be it known that I, SAMUEL R. FRAIM, a citizen of the United States, residing at Lancaster, in the county 0f Lancaster and State of Pennsylvania, have invented certain new and useful Improvements in ladlocks, of which the following is a speciiication.

This invention relates to improvements in the class of locks, generally referred to as padlocks, and pertains more particularly to locks for the throttle and spark control for automobiles, rear spare tire carriers, for plain rims, and disc wheels in which a removable shackle is employed to embrace said parts of thel automobile control. An object of my invention isto provide a padlock, of the nature described, embodying a shackle and locking members for automatically lockingr the parts when the shackle is inserted inthe proper end of the casing, namely, the endy opposite to that in which the key plug is located.

Another object of my invention is to provide a locking mechanism in which it will be impossible to insert the shackle in improper position in such a manner that the shackle would interfere with theplacing of av key in the properend for unlocking, which comprises a distinct advantage in locks of the character referred to, and avoids the disadvantages incident to such locks not thus equipped.

A further object of lmy invention is to produce a lock ofthe naturey described in which the desired results are vaccomplished by a minimum number'of associatedy parts in a more simple, cheap, and efficient combination than has heretofore been attained.

A still further object is to provide a padlock in which the locking mechanism shall consist in locking bolts being snugly fitted in the casing so as to provide for lateral and prevent longitudinal movement, the locking bolts being parallel and having their extremities in the same lateral plane to insure against forcible yopening of the padlock by equally` distributing the resistance to shock.

With the foregoing and other objects in view, my invention consists in the lcombination and arrangement of associated parts andin the details of construction hereinafter described and more particularly pointed out'in the claims; certain embodiments being illustrated in the accompanying drawings, in which:

Figure 1 is a plan view of the padlock with the upper parts of the casing removed, showing the shackle in locked position and the key inserted, in dotted lines;

Figure 2 is a similar view showing the shackle partially inserted in the improper manner and abutting the protruding flat ends of the locking bolts to illustrate the impossibility of locking the shackle in improper position; ,Y Figure 3 is a bottom plan view of the padlock with the shackle withdrawn, showing the bolts protruding into the shackle Ychannels in the casing;

Figure 4 is a view in section taken along lines 4-4 of Figure 2;

Figure 5 is a bottom plan view in detail of the locking bolts and their resilient actuating y members Figure 6 is a detail view in end elevation of one of the bolts, showing the hole in the end anda depression in its extension for the reception of the two spring actuating members 5 Figure 7 is a view similar to Figure 5, showing the key bearing on the shoulders of the bolts, the latter being in retracted and unlocked position.

Referring more particularly to the drawings the casing consists of an upper and lower portion 1 and 1. The lower half l is provided with cross ribs 19, 18, 17, and 12 and a plurality of rivets 20 for connecting the two halves of the casing together. The casing is further provided with channels 1G and 16 extending throughout both ends `21 and 22 of the casing and kthrough the intermediate cross ribs above referred to The shackle is preferably U-shaped and has its legs 2 and 3 provided with a plurality of notches such as shown at 2 andv 3 the legs 2 and 3 also having their extremities bevelled at 26 and 26.

The'locking mechanism for the padlock is automatic in yits operation and consists mainly in a pair of opposed angularlocking bolts, arranged between the ribs 17 and '18 of the casing,- and adapted to slide laterally upon each other in overlapping relation in such a manner as to engage the shackle in locked relation. Each of the bolts 4 and 5 isprovided with a central out-out portion 23 and 24, respectively through which the bolts out of locked engagement with the shackle is accomplished against the action of spring actuated mechanism for normally and automatically distending the bolts and locking the shackle.k This spring means y consists in aA compression coil spring 6, lo-

cated in a channel 14 inthe end of the bolt 1, forcing `a. rod-Tinto a corresponding depression 13 iny the angular overlapping and upwardly extending extension of the bolt 5; while in lthe hole 11 in the end ofthe bolt 5 is locateda springy 8` adapted to force a rod 9 into a corresponding depression 13 in the angular overlapping and downwardly extending extension et ofthe bolt 4. This enables the bolts 4 and 5 to be normally spring-actuated in an outward and opposite direction, the springs being -interposed between and` bearing upon vthe bolts alone to force them outwardly into locking position.

A key plug 10 isrotatably and removably mounted on the rib 19 of the casing to revLO ceive a `key in thekey plug slot 11. The key 15 is provided.withnotches 28, 29 and and a tit 27 registering with the ribs 12, 17 and 18and therdepression 26 of: the casing, respectively, insuch a manner that the key when properly inserted may be rotated without interference and also rotate the key plug 10, therewith. The key when thus inserted and rotated in the proper direction, engages the shoulders 23 and 24 of the bolts f1 and 5, retracts the bolts upon each other out of engagement with'the notches 2 and 3 of the shackle and out of the channels 16 and 16, against the action of the-springs 6 and 8, and allows the shackle to be read-V ily Withdrawn from the casing.

The `bolts 4 and 5 besides being arranged in parallel and overlapping position between the ribs 17 and 18,` are fitted snugly `vbut slidably therein, and have their flat edges which engage thenotches 2 and 3 of the shackle legs 2 and 3 in the same plane. This arrangement insures against a forcible opening of the lock without using the proper keyy as any pressure exerted on the shackle will be equally distributed to both bolts and the bolts are prevented from longitudinal -movement by reason of their close engagement bythe ribs of the casing.

AIn order to `lock the'device itis only necessary to insert the shackle in the endA 22 of the lock as shown in Figure 1, the bevelled edges 26 and 26 of the shackle legs 2 and providing for a ready insertion of the shackle. The extension 4 and of the bolts -l and 5, being spring actuated, engage the notches 2 and 3 of the shackle legs 2 and 3, Aand retain the shackle in locked l position. The bevelled or curved edges on the bolts allows the corresponding bevelled edges 26 and 26 of the shackle to be readily inserted in the end 22 of the lock past the bolts which lock the-shackle, the key' slot being arranged;` in the opposite end 21. lVhenthus properly locked and the shackle inserted in the man-ner'described, the key may be. applied without interference with the'shackle.- If, however, the. shackle were inserted in theV end 21 of the padlock by inadvertence, it will be readily seen that the curved portion` of the shackle would be in such a position adjacent the key plug that it would be` impossible to insert the key. rThus the device could not beunlocked and the same. wouldhave to be 'dissembled in order to `removethe shackle.

.Y In order to guard againstsuch a situation the angular extensions L1 and 5 of the locking-bolts 4: and 5 have onlyfth'eir upper sides bevelled or curved while their lower extremities are flatf an dnormally extend into path of the shackle in the. channels 16, in

vorder to render it impossible to insert the shackle in the improper mannerA far enough to be engaged injlocked relation. y

Thus it` will beseen that there has been provided a.removable-shackle padlock consisting in the minimumr number of easily and cheaply Amanufactured parts `readily assembled, disselmbled, and greplaced with the maximum of ease. There has also been provided a padlock witlrthe. mostettic'ient and simple mechanism forv automatically locking al shackle when properly` applied, and for positively preventing' thek insertion and locked engagement of a shacklewhen improperly applied to the padlock.

The construction of lthe locking bolts in overlapping relation, when the spring actual tion members so arranged that they extend betweeirtjlie component partsof the bolts,

bearing. upon these parts alone, provides Vfor an effectivemechanism .for keeping the bolts in outwardly` distending locking position. This avoids the useof more ycomplicated lockingmechanisnncsuch as tumblers and'` the like,. a:nd atathe same 'time guards` against malfunction of its parts.

An improvedgmeans for unlocking has also been provided-by the construction of a. key plug adapted to rotate with the key, andthe provision of locking bolts with such portions that the key -when rotated engages shoulders,` of the bolts incident to such cutout portions in such a manner as to slide the bolts-uponeachother and withdraw them from engagement with 'the shackle. The arrangement of the locking bolts in snug relation with and between lateral ribs of the casing, the bolts being parallel and overlapping so that the locking extremities engaging the shackle are in the same lateral plane, provides for an equally distributed resistance to shock and insure against a forcible and unauthorized opening of the padlock.

I claim- 1. A padlock comprising a casing provided with channels to receive a shackle, a pair ofspring actuated locking bolts, said bolts having angular extensions, bevelled on their upper and flat on their lo'wer sides and adapted normally to protrude into said channels, each of said bolts having a spring plunger mounted in one end and bearing on the angular extension of the other bolt, one of said extensions extending upwardly and the other downwardly, said bolts being adapted to slide upon each other and engage said shackle in locked relation.

2. A padlock comprising a casing provided with channels to receive a shackle, a pair of spring-actuated locking bolts arranged parallel between ribs of said casing, said bolts having angular extensions, bevelled on their upper and flat on their lower sides and adapted normally to protrude into said channels, each of said bolts having` a spring plunger ymounted in one end and bearing on the angular extension of the other bolt, one of said extensions extending upwardly and the other downwardly, said bolts being adapted to slide upon each other and engage said shackle in locked relation.

In testimony whereof I affix my signature. v

SAMUEL R. FRAIM. 

